dic0 = {'a': 11, 'b': 22, 'c': 77, 'd': 88, 'e': 99, 'e': 100}
dic1 = {'a': 11, 'b': 22, 'c': 77, 'd': 88, 'e': 99, 'e': 100}

print(dic0.get('e'))
print(dic0['a'])
dic3 = dic0.copy()
dic0['a'] = 88
print(dic3)
print(dic0)
print(dic0.get('a', 6666))
print(dic0.__contains__('a'))
print('b' in dic0)
for key in dic0.keys():
    print(f'{key},{dic0[key]}')
